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Author: Theresa Jayne Morrison
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The increased presence of warm Atlantic water on the Greenland continental shelf and within glacial fjords has been connected to the accelerated melting of the Greenland Ice Sheet, particularly in the southwest and southeast continental shelf regions. Meltwater is transported into the Labrador Sea where it may disrupt deep convection, a process that has been linked to the variability of the Atlantic Meridional Overturning Circulation (AMOC). To study the transport of heat onto the continental shelf and freshwater into the Labrador Sea, we use coupled ocean/sea-ice simulations with horizontal resolutions that permit or resolve mesoscale eddies. We compare the on shelf transport of heat in two mesoscale eddy-permitting simulations. In both simulations, the region of greatest heat flux onto the shelf is southeast Greenland and south of the Denmark strait, where there is a seasonally persistent pattern of multi-day variability in the cross-shelf heat flux. This high-frequency variability is associated with Denmark Strait Overflow eddies propagating along the shelfbreak. Using mesoscale eddy-resolving simulations to compare the off-shelf transport of meltwater and impacts on the West Greenland Current, we find that vertically distributed meltwater results in an increase in total freshwater flux into the Labrador Sea. Eddy kinetic energy and baroclinic conversion in the West Greenland Current along the continental shelf break also increase with the addition of vertically distributed meltwater. Finally, we derive and test a box model to represent the mixing within fjords. This Fjord Box Model merges buoyant plume theory with the estuarine mixing that occurs along fjords. The Fjord Box Model provides a more realistic boundary condition for meltwater forcing in ocean models that cannot resolve fjords.
Author: Theresa Jayne Morrison
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The increased presence of warm Atlantic water on the Greenland continental shelf and within glacial fjords has been connected to the accelerated melting of the Greenland Ice Sheet, particularly in the southwest and southeast continental shelf regions. Meltwater is transported into the Labrador Sea where it may disrupt deep convection, a process that has been linked to the variability of the Atlantic Meridional Overturning Circulation (AMOC). To study the transport of heat onto the continental shelf and freshwater into the Labrador Sea, we use coupled ocean/sea-ice simulations with horizontal resolutions that permit or resolve mesoscale eddies. We compare the on shelf transport of heat in two mesoscale eddy-permitting simulations. In both simulations, the region of greatest heat flux onto the shelf is southeast Greenland and south of the Denmark strait, where there is a seasonally persistent pattern of multi-day variability in the cross-shelf heat flux. This high-frequency variability is associated with Denmark Strait Overflow eddies propagating along the shelfbreak. Using mesoscale eddy-resolving simulations to compare the off-shelf transport of meltwater and impacts on the West Greenland Current, we find that vertically distributed meltwater results in an increase in total freshwater flux into the Labrador Sea. Eddy kinetic energy and baroclinic conversion in the West Greenland Current along the continental shelf break also increase with the addition of vertically distributed meltwater. Finally, we derive and test a box model to represent the mixing within fjords. This Fjord Box Model merges buoyant plume theory with the estuarine mixing that occurs along fjords. The Fjord Box Model provides a more realistic boundary condition for meltwater forcing in ocean models that cannot resolve fjords.
Author: David N. Thomas
Publisher: John Wiley & Sons
ISBN: 1118778383
Category : Science
Languages : en
Pages : 666
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Book Description
Over the past 20 years the study of the frozen Arctic and Southern Oceans and sub-arctic seas has progressed at a remarkable pace. This third edition of Sea Ice gives insight into the very latest understanding of the how sea ice is formed, how we measure (and model) its extent, the biology that lives within and associated with sea ice and the effect of climate change on its distribution. How sea ice influences the oceanography of underlying waters and the influences that sea ice has on humans living in Arctic regions are also discussed. Featuring twelve new chapters, this edition follows two previous editions (2001 and 2010), and the need for this latest update exhibits just how rapidly the science of sea ice is developing. The 27 chapters are written by a team of more than 50 of the worlds’ leading experts in their fields. These combine to make the book the most comprehensive introduction to the physics, chemistry, biology and geology of sea ice that there is. This third edition of Sea Ice will be a key resource for all policy makers, researchers and students who work with the frozen oceans and seas.
Author: Tong Lee
Publisher: Frontiers Media SA
ISBN: 2889631206
Category : Science
Languages : en
Pages : 867
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Book Description
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Author: James P.M. Syvitski
Publisher: Springer Science & Business Media
ISBN: 1461246326
Category : Science
Languages : en
Pages : 381
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Book Description
Fjords are both an interface and a buffer between glaciated continents and the oceans. They exhibit a very wide range in environmental conditions, both in dynamics and geography. Some are truly wonders of the world with their dizzying mountain slopes rising sharply from the ocean edge. Others represent some of the harshest conditions on earth, with hurricane winds, extremes in temperature, and catastrophic earth and ice movements. Fjords are unique estuaries and represent a large portion of the earth's coastal zone. Yet they are not very well known, given the increasing population and food pressures, and their present industrial and strategic importance. Temperate zone estuaries have had many more years of intense study, with multiyear data available. Most fjords have not been impacted by man but, if history repeats itself, that condition will not last long. Fjords present some unique environmental problems, such as their usually slow flushing time, a feature common to many silled environments. Thus there is presently a need for management guidelines, which can only be based on a thorough knowledge of the way fjords work. Fjords are, in many respects, perfect natural oceanographic and geologic lab oratories. Source inputs are easily identified and their resulting gradients are well developed. Throughout this book, we emphasize the potential of modeling pro cesses in fjords, with comparisons to other estuary, lake, shelf and slope, and open ocean environments.
Author: Rod Sutterby
Publisher: Stackpole Books
ISBN: 081170145X
Category : Nature
Languages : en
Pages : 152
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Book Description
Details the salmon's extraordinary life cycle and covers the scientific research on exactly where salmon travel to in the sea, what influences the numbers that return to the river, the impact of global warming on migratory patterns, and what we can tell from scale readings.
Author: P.R.. Dawes
Publisher: Museum Tusculanum Press
ISBN: 9788763511506
Category : Geology
Languages : en
Pages : 396
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Author: Alan Nairn
Publisher: Springer
ISBN: 1475712480
Category : Science
Languages : en
Pages : 684
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Book Description
This trip backward in time capsulizes in a general way the geologic development of the area that is now northern Alaska. The Cretaceous through Recent history is predominantly one of erosion of the ancient Brooks Range and filling of the Colville Geosyncline under processes like those in Operation today. All the rocks older than Jurassic, however, were deposited far from their present sites. One of the intriguing tectonic puzzles involves the geographic positions and relative timing of events that occurred during the orogeny that built the Brooks Range. I suggest that pre-Cretaceous deposition took place far to the north along the western margin of the Caledonides. Subsequently, the region that is now northern Alaska moved southward and impinged upon a northward moving plate, or plates, from the Pacific region. Interactions between these two major parts of the earth's crust produced the Brooks Range during the Jurassic. Later developments reflect continuing readjustments of the northern third of of thrust Alaska as southward movement was dissipated in diverse systems faulting and lateral displacement. ACKNOWLEDGMENTS I am indebted to many colleagues who, during the past 30 years, shared with me the excitement and pleasures of exploring the geology of northern Alaska. Among these are W. P. Brosge, H. N. Reiser, R. L. Detterman, A. K. Armstrong, A. L. Bowsher, E. G. Sable, I. L. Tailleur, C. G. Mull, M. D. Mangus, A. H. Lachenbruch, M. C. Lachenbruch, R. L. Morris, C. J.
Author: Henry S. Kaminski
Publisher:
ISBN:
Category : Sea ice
Languages : en
Pages : 42
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Book Description
Author: Wilfred E. Richard
Publisher: Smithsonian Institution
ISBN: 1588343790
Category : Travel
Languages : en
Pages : 272
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Book Description
Maine to Greenland is a testament to one of the world's great geographic regions: the Maritime Far Northeast. For more than three decades, William W. Fitzhugh and Wilfred E. Richard have explored the Northeast’s Atlantic corridor and its fascinating history, habitat, and culture. The authors’ powerful personal essays and Richard’s stunning photography transport readers to this vibrant region, joining Smithsonian archaeological expeditions and trekking in vast and amazing terrain. Following Fitzhugh and Richard’s travels north—from Maine to the Canadian Maritimes, Newfoundland and northern Quebec, then to Labrador, Baffin and Ellesmere islands, and Greenland—we view incredible landscapes, uncover human history, and meet luminous personalities along the way. Fully illustrated with 350 full-color photographs, Maine to Greenland is the first in-depth treatment of the Northeast Atlantic corridor and essential for armchair travelers, locals, tourists, or anyone who has journeyed there. Today green technology, climate change, and the opening of the Arctic Ocean have transformed the Maritime Far Northeast from an icy frontier into a global resource zone and an increasingly integrated international crossroads. In our rapidly converging world, we have much to learn from the Maritime Far Northeast and how its variety of cultures have adapted to rather than changed their environments during the past ten thousand years. Maine to Greenland is not only a complete account of the region’s unique culture and environment, but also a timely reminder that amidst the very real consequences of climate change, the inhabitants of the Maritime Far Northeast can show us grounded and sustainable ways of living.
Author:
Publisher: Natural Resources Canada
ISBN:
Category :
Languages : en
Pages : 199
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